Quirk

1. (n.) A sudden turn; a starting from the point or line; hence, an artful evasion or subterfuge; a shift; a quibble; as, the quirks of a pettifogger.
2. (n.) A fit or turn; a short paroxysm; a caprice.
3. (n.) A smart retort; a quibble; a shallow conceit.
4. (n.) An irregular air; as, light quirks of music.
5. (n.) A piece of ground taken out of any regular ground plot or floor, so as to make a court, yard, etc.; -- sometimes written quink.
6. (n.) A small channel, deeply recessed in proportion to its width, used to insulate and give relief to a convex rounded molding.